The hevi 13's don't pattern well at all in my setup( 870 SPS-T). They didn't do well in my other gun either. The Rem. hevi shot magnums are awesome in both of my guns. The high velocity does pretty good also, but not as well as the mags. I use the 3 1/2 inch 5 shot. I also use the jellyhead choke. I won't use hevi 13's, but I'm sure they do well in some guns.